Henry crowe



H. CROWE.

HYDRAULIC VALVE SEATING.

APPLICATION man JUNE 24, 191 s.

1,303,035., Patented May 6, 1919.

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I V r if w r a 45 2 h zlime lses" fywma or fiwuy Qwwe HENRY CROWE,SALTBUBN, ENGLAND.

HYDItAULIC-VALVE SEATING.

' Specification of Letters Patent.

; -Patented May 6, 1919.

Application filed June 24, 1918. Serial No. 241,599.

To all whom it may concern:

Be it known that I, HENRY CROWE, a sub ject of the Kin of England,residing at Saltburn-by-theea, in the county of York, England, haveinvented certain new and useful Improvements in Hydraulic-ValveSeatings, of which the following is a specification.

My invention relates to seatings of hydraulic operating valvescontrolling single and double acting hydraulic cylinders and pertainsmore particularly to that type of valve in which a cage is employed forholdi ing a loose valve .seat in position. The object of this inventionis to provide an improved Torm of construction of such a cage and todesign and arrange the latter in such a manner that the usual valvespindle packing gland is altogether dispensed with. A further object isto so construct the working parts that they are adapted to be removed bythe removal of one single cover.

The hydraulic valve consists in the case of a single acting valve of oneinlet and one exhaust miter valve, and in the case of a double actingvalve of two inlet and two outlet or exhaust miter valves, all placed onone center line.

The inlet and exhaust valves being substantially similar inconstruction, one valve only is illustrated in the drawing which shows asectional elevation.

To carry out my invention 1 make provision of a valve body ofsubstantially known design having the usual branch connections forcoupling the valve to the hydraulic cylinder and pressure supply mainrespectively, the latter devices not being shown since they are notintended to form part of the invention. The said valve-body or casing ismade to receive a loose valve seat 5. This seat is formed with anextension 6 which projects into the lower extended portion a of thevalve body or casing where, by means of the reduced and ring-shapedintegral ends 6 of the extension 5 the latter engages a Ll packingleather (2' serving as a hydraulic .joint for the valve operatingspindle j. in this manner the packing leather (2 is prevented fromrising and at the same time the neckbush G, which is fitted at thebottom of the valve body and serves as a guide for the spindle j and asa rest for the packing leather d, is held in position.

The valve seat 5, in turn, is held in position by a cage 0 ofwhich thereduced and recessed portion 0 serves as a guide and receptaclerespectively for the valve spindle S with valve V and the spring 39influencing same. The cage 0 is provided with a ringshaped shoulder 0adapted to receive a U packing leather d which thus forms a hy draulicjoint between the valve casing and thecage 0, while a cover e screwedinto the top of the valve body or casing and fitting over the reducedportion 0 is adapted to press the packing leather d onto the shoulder 0and to hold the cage firmly against the valve seat. 7

The valve operating spindle j is preferably provided with a detachablecollar K on the bottom end, the diameter of said collar being slightlyless than the diameter of the reduced portion of the neck bush G, sothat when it is desired to remove the whole of the internal parts of thevalve, and on removal of the cover e, upward pressure is applied to thevalve operating spindle j whence the collar K presses on the undersideof the neck bush G which in turn presses upward the loose valve seat I)and the cage 0, together with the U leathers, valve spindle and spring.

Having now fully desc ibed my said invention what I claim and'desire tosecure by Letters Patent is 1. In a hydraulic operating valve of the itype described, the combination, with a valve seat loosely mounted inthe casing of the valve and having an extension which projects ,into thelower portion of the said casing, of a U packing leather engaged by saidextension, a neck bush mounted at the bottom of the casing and forming arest for the packing leather, a spindle extending through the neck bush,the packing leather and the bottom part of the valve seat, a cage fittedin the upper portion of the valve casin the said cage having aring-shaped shoulder and a reduced and recessed centrally disposedportion, a spring-influenced valve spindle guided by the said recessedportion and means to hold the cage, valve seat and packing leathers inposition.

2. The herein described valve seat loosely mounted in the valve casing,in combination with a cage resting on the said seat and having a reducedand recessed center portion and a ring-shaped shoulder, a U

packing leather fitted over the said shoulder,

a spring-influenced valve spindle guided by v the recessed centerportion of the cage, a

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neck bush mounted at the bottom of the In testimony whereof I havehereunto set valve casing, an operating spindle extending my hand in thepresence of two subscribing through the neck bush, and the lower end ofwitnesses.

the downwardly extended valve seat, and HENRY CROWE. means to permit ofthe simultaneous re- Witnesses: 1

moval of all the working parts of the valve, JOHN WILLIAM WALTON,substantially as set forth and shown. FREDERICK CORNER.

